CN113277783A - Epoxy asphalt concrete for roads and bridges and preparation method thereof - Google Patents
Epoxy asphalt concrete for roads and bridges and preparation method thereof Download PDFInfo
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- CN113277783A CN113277783A CN202110557548.6A CN202110557548A CN113277783A CN 113277783 A CN113277783 A CN 113277783A CN 202110557548 A CN202110557548 A CN 202110557548A CN 113277783 A CN113277783 A CN 113277783A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/36—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
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Abstract
The invention discloses epoxy asphalt concrete for roads and bridges and a preparation method thereof. The epoxy asphalt concrete mainly comprises the following raw materials, by weight, 35-45 parts of epoxy asphalt, 180 parts of cement, 350 parts of aggregate and 150 parts of water. The epoxy asphalt comprises bio-based epoxy resin, matrix asphalt, modified sepiolite and a curing agent; the bio-based epoxy resin is used for replacing petroleum-based epoxy resin, so that the dependence on petroleum resources is reduced, and the concept of green chemistry is met. The sepiolite can fully exert the service performance of the sepiolite as the epoxy asphalt filler through the comprehensive treatment of the ethylene diamine tetraacetic acid and the epoxy chloropropane; the epoxy asphalt concrete prepared by the scheme can improve the cracking phenomenon of the concrete in a low-temperature environment in winter and the water absorption and moisture absorption of a pavement and a bridge deck; the epoxy asphalt concrete and the preparation method thereof provided by the invention can be widely applied to the construction of roads and bridge surfaces.
Description
Technical Field
The invention relates to the technical field of asphalt concrete, in particular to epoxy asphalt concrete for roads and bridges and a preparation method thereof.
Background
The epoxy asphalt is characterized in that epoxy resin and a curing agent are added into matrix asphalt, the epoxy resin forms a multiphase polymer high molecular material under the action of acid anhydride and amine curing agents, and after the epoxy resin and the curing agent are subjected to curing reaction, matrix asphalt molecules are dispersed in a network structure formed by the epoxy resin to form a stable solid-phase compound; the curing belongs to an irreversible process, and the epoxy resin does not have fluidity after being cured and heated, so that an asphalt system has excellent mechanical property and high-temperature stability.
At present, the epoxy asphalt concrete has good application in large-span bridges such as the second bridge of Changjiang river in Nanjing, the Tiger gate bridge in Dongguan city and the like in China and some high-grade roads. The epoxy asphalt has excellent high-temperature performance, but in a low-temperature environment in winter, the epoxy asphalt material can be hardened and brittle and then cracked, and large-area damage to the pavement and the bridge deck can be quickly caused under the combined action of heavy load of vehicles, rainwater, snow fog and the like after cracking, so that the service lives of the pavement and the bridge deck are influenced, and the maintenance cost of the pavement and the bridge deck is increased.
Therefore, the low-temperature anti-cracking performance of the epoxy asphalt is improved, and the epoxy asphalt has obvious technical and economic benefits and social benefits.
Disclosure of Invention
The invention aims to provide epoxy asphalt concrete for roads and bridges and a preparation method thereof, so as to solve the problems in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: the epoxy asphalt concrete comprises the following raw materials, by weight, 35-45 parts of epoxy asphalt, 180 parts of cement, 350 parts of aggregate and 150 parts of water.
Furthermore, the epoxy asphalt comprises the following raw materials, by weight, 25-35 parts of bio-based epoxy resin, 75-90 parts of matrix asphalt, 15-20 parts of modified sepiolite and 5-7 parts of a curing agent.
Furthermore, the modified sepiolite is mainly prepared by reacting sepiolite fibers, ethylene diamine tetraacetic acid, dodecyl-N, N-dimethyl tertiary amine and epichlorohydrin.
Furthermore, the bio-based epoxy resin is mainly prepared by reacting eugenol, epichlorohydrin and tetrabutylammonium bromide.
Further, the curing agent is an acid anhydride curing agent which is an amine curing agent or an acid anhydride curing agent.
Furthermore, the epoxy asphalt also comprises a toughening agent, a compatilizer and a diluent; the toughening agent can be any one of silicon rubber, nitrile rubber, sulfur rubber and polyether; the aggregate comprises broken stone, sand and fly ash.
A preparation method of epoxy asphalt concrete for roads and bridges comprises the following steps,
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring, adding an ethylene diamine tetraacetic acid solution, stirring, filtering, and drying to constant weight to obtain activated sepiolite; dispersing the activated sepiolite into a dilute sulfuric acid solution, heating to 105-115 ℃, and adding epichlorohydrin for reaction under the protection of nitrogen to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 80-90 ℃ for reaction, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane, adding tetrabutyl ammonium bromide, uniformly stirring, carrying out nitrogen protection, heating to 115-125 ℃ for reaction, cooling, adding a sodium hydroxide solution, carrying out reaction, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 0-10 ℃, adding peroxyacetic acid for reaction, extracting, distilling under reduced pressure, and drying to obtain the bio-based epoxy resin;
s2, heating the matrix asphalt, adding a toughening agent, a compatilizer and a curing agent, and stirring to obtain a component A; heating the bio-based epoxy resin prepared in the step S1 to 75-80 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 125-135 ℃, adding the component B into the component A, and stirring to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing cement, water, aggregate and the epoxy asphalt prepared in the step (2), and heating and stirring to obtain the epoxy asphalt concrete.
Preferably, the preparation method of the epoxy asphalt concrete for roads and bridges comprises the following steps;
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring for 30-40min, adding an ethylene diamine tetraacetic acid solution, stirring for 10-15min, filtering, and drying to constant weight to obtain activated sepiolite; dispersing the activated sepiolite into a dilute sulfuric acid solution, heating to 105-115 ℃, adding epoxy chloropropane under the protection of nitrogen, and reacting for 8-10h to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 80-90 ℃, reacting for 10-12h, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane according to the mass ratio of 1:1-3, adding tetrabutyl ammonium bromide, uniformly stirring, protecting with nitrogen, heating to 115-125 ℃, reacting for 3-4h, cooling to 60-70 ℃, adding a sodium hydroxide solution, reacting for 1-2h, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 0-10 ℃, adding peroxyacetic acid, reacting for 40-48h, extracting by using a sodium carbonate solution, distilling under reduced pressure, and drying to obtain the bio-based epoxy resin;
s2, heating the matrix asphalt to the temperature of 125-; heating the bio-based epoxy resin prepared in the step S1 to 75-80 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 125-135 ℃, adding the component B into the component A, and stirring for 45-60min to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing the cement, the water, the aggregate and the epoxy asphalt prepared in the step (2), and stirring at the temperature of 125-145 ℃ to obtain the epoxy asphalt concrete.
In the step of preparing the epoxy asphalt, the bio-based epoxy resin is adopted to replace petroleum-based epoxy resin, so that the requirement of green chemistry is met. The eugenol epoxy resin is prepared by condensing and oxidizing eugenol which is a green renewable resource and epoxy chloropropane, is nontoxic and does not generate harmful gas under the high-temperature condition; in addition, the aromatic ring structure in the eugenol can enhance the strength and the thermal stability of the epoxy resin, and the epoxy asphalt concrete processed by the eugenol has the advantages of high strength and good stability.
The sepiolite fiber is introduced as a mineral raw material with a layer chain structure, the sepiolite fiber has a porous structure in the molecule, has large specific surface area, excellent water absorption and moisture absorption performance and is soft after water absorption and expansion, and cannot cause mixing when added into an asphalt concrete systemThe concrete is expanded and cracked; besides, the sepiolite fibers are good heat-insulating materials, so that the epoxy asphalt concrete system can be kept at a low temperature of the external environment in winter, the epoxy asphalt concrete is kept relatively constant, and the epoxy asphalt concrete can not crack due to sudden temperature drop. But sepiolite fibers containing Mg2+、Fe3+The existence of metal ions can accelerate the corrosion of acidic substances in rainwater on a concrete pavement and a bridge floor, so that the quality of the pavement and the bridge floor is changed, and the normal use is influenced; in order to solve the problems, an ethylene diamine tetraacetic acid solution is added in the process of modifying the sepiolite fibers, and the ethylene diamine tetraacetic acid solution and magnesium ions can form a stable hexahedral complex taking the magnesium ions as the center; the complex is stable in water environment and is not easy to dissociate, so that magnesium ions are prevented from diffusing into the epoxy asphalt concrete, the quality change of the pavement bridge deck caused by rainwater erosion is reduced, and the service life of the epoxy asphalt concrete pavement bridge deck is prolonged. In order to remove the influence of magnesium ions to a greater extent, excessive ethylenediamine tetraacetic acid is required to be added in the actual operation, and the long-term existence of the excessive ethylenediamine tetraacetic acid can corrode sepiolite fibers, destroy the mechanical properties and structural characteristics of the sepiolite fibers, and indirectly influence the service performance of the epoxy asphalt concrete.
In order to remove excessive ethylene diamine tetraacetic acid in sepiolite fibers, epichlorohydrin is added to react with ethylene diamine tetraacetic acid to obtain an esterification product, and the esterification product is reacted with dodecyl-N, N-dimethyl tertiary amine to finally obtain the ethylene diamine tetraacetic acid tetraester quaternary ammonium salt. The ethylene diamine tetraacetic acid tetraester quaternary ammonium salt is a cationic surfactant, can play a good role in emulsifying in the asphalt concrete, and utilizes the positive charge effect to enhance the binding power of the epoxy resin asphalt and stone, and enhance the anti-cracking performance of the epoxy asphalt concrete.
Compared with the prior art, the invention has the following beneficial effects: the invention provides epoxy asphalt concrete for roads and bridges, which uses bio-based epoxy resin prepared by reacting eugenol with epoxy chloropropane to replace petroleum-based epoxy resin, reduces dependence on petroleum resources, has excellent mechanical property and thermal stability of the eugenol-based epoxy resin, and can enhance the strength and stability of the epoxy asphalt concrete. The invention also introduces modified sepiolite fibers, and the sepiolite fibers are used as fillers of epoxy asphalt after being subjected to comprehensive treatment of ethylenediamine tetraacetic acid, epoxy chloropropane and the like, so that the cracking phenomenon of epoxy asphalt concrete in a low-temperature environment in winter can be improved, and the water absorption and the moisture absorption of a road surface and a bridge deck are improved; the epoxy asphalt concrete and the preparation method thereof provided by the invention can be widely applied to the construction of roads and bridge surfaces.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The epoxy asphalt concrete for roads and bridges comprises the following raw materials, by weight, 35 parts of epoxy asphalt, 150 parts of cement, 250 parts of aggregate and 125 parts of water;
the epoxy asphalt comprises the following raw materials, by weight, 25 parts of epoxy resin, 75 parts of matrix asphalt, 15 parts of modified sepiolite and 5 parts of a curing agent.
The curing agent is an acid anhydride curing agent which is an amine curing agent or an acid anhydride curing agent; the epoxy asphalt also comprises a toughening agent, a compatilizer and a diluent; the aggregate comprises broken stone, sand and fly ash.
The preparation steps are as follows;
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring for 30min, adding an ethylene diamine tetraacetic acid solution, stirring for 10min, filtering, and drying to constant weight to obtain activated sepiolite; dispersing activated sepiolite into a dilute sulfuric acid solution, heating to 105 ℃, adding epoxy chloropropane under the protection of nitrogen, and reacting for 8 hours to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 80 ℃, reacting for 10 hours, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane according to a mass ratio of 1:1, adding tetrabutyl ammonium bromide, uniformly stirring, protecting with nitrogen, heating to 115 ℃, reacting for 3 hours, cooling to 60 ℃, adding a sodium hydroxide solution, reacting for 1 hour, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 0 ℃, adding peroxyacetic acid, reacting for 40 hours, extracting by using a sodium carbonate solution, distilling under reduced pressure, and drying to obtain bio-based epoxy resin;
s2, heating the matrix asphalt to 125 ℃, adding the toughening agent, the compatilizer and the curing agent, and stirring for 20min to obtain a component A; heating the bio-based epoxy resin prepared in the step S1 to 75 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 125 ℃, adding the component B into the component A, and stirring for 45min to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing the cement, the water, the aggregate and the epoxy asphalt prepared in the step (2), and stirring at the temperature of 125-145 ℃ to obtain the epoxy asphalt concrete.
Example 2
The epoxy asphalt concrete for roads and bridges comprises the following raw materials, by weight, 42 parts of epoxy asphalt, 157 parts of cement, 316 parts of aggregate and 135 parts of water;
the epoxy asphalt comprises the following raw materials, by weight, 30 parts of epoxy resin, 82 parts of matrix asphalt, 17 parts of modified sepiolite and 6 parts of a curing agent.
The curing agent is an acid anhydride curing agent which is an amine curing agent or an acid anhydride curing agent; the epoxy asphalt also comprises a toughening agent, a compatilizer and a diluent; the aggregate comprises broken stone, sand and fly ash.
The preparation steps are as follows;
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring for 35min, adding an ethylene diamine tetraacetic acid solution, stirring for 12min, filtering, and drying to constant weight to obtain activated sepiolite; dispersing activated sepiolite into a dilute sulfuric acid solution, heating to 110 ℃, adding epoxy chloropropane under the protection of nitrogen, and reacting for 9 hours to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 85 ℃, reacting for 11 hours, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane according to a mass ratio of 1:2, adding tetrabutyl ammonium bromide, uniformly stirring, protecting with nitrogen, heating to 120 ℃, reacting for 3.5 hours, cooling to 63 ℃, adding a sodium hydroxide solution, reacting for 1.5 hours, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 5 ℃, adding peroxyacetic acid, reacting for 45 hours, extracting by using a sodium carbonate solution, distilling under reduced pressure, and drying to obtain bio-based epoxy resin;
s2, heating the matrix asphalt to 128 ℃, adding the toughening agent, the compatilizer and the curing agent, and stirring for 25min to obtain a component A; heating the bio-based epoxy resin prepared in the step S1 to 77 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 130 ℃, adding the component B into the component A, and stirring for 50min to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing cement, water, aggregate and the epoxy asphalt prepared in the step (2), and stirring at the temperature of 137 ℃ to obtain the epoxy asphalt concrete.
Example 3
The epoxy asphalt concrete for roads and bridges comprises the following raw materials, by weight, 45 parts of epoxy asphalt, 155 parts of cement, 287 parts of aggregate and 140 parts of water;
the epoxy asphalt comprises the following raw materials, by weight, 35 parts of epoxy resin, 90 parts of matrix asphalt, 15 parts of modified sepiolite and 7 parts of a curing agent.
The curing agent is an acid anhydride curing agent which is an amine curing agent or an acid anhydride curing agent; the epoxy asphalt also comprises a toughening agent, a compatilizer and a diluent; the aggregate comprises broken stone, sand and fly ash.
The preparation steps are as follows;
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring for 40min, adding an ethylene diamine tetraacetic acid solution, stirring for 15min, filtering, and drying to constant weight to obtain activated sepiolite; dispersing activated sepiolite into a dilute sulfuric acid solution, heating to 115 ℃, adding epoxy chloropropane under the protection of nitrogen, and reacting for 10 hours to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 90 ℃, reacting for 12 hours, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane according to a mass ratio of 1:3, adding tetrabutyl ammonium bromide, uniformly stirring, protecting with nitrogen, heating to 125 ℃, reacting for 4 hours, cooling to 70 ℃, adding a sodium hydroxide solution, reacting for 2 hours, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 10 ℃, adding peroxyacetic acid, reacting for 48 hours, extracting by using a sodium carbonate solution, distilling under reduced pressure, and drying to obtain bio-based epoxy resin;
s2, heating the matrix asphalt to 135 ℃, adding the toughening agent, the compatilizer and the curing agent, and stirring for 30min to obtain a component A; heating the bio-based epoxy resin prepared in the step S1 to 80 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 135 ℃, adding the component B into the component A, and stirring for 60min to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing cement, water, aggregate and the epoxy asphalt prepared in the step (2), and stirring at the temperature of 145 ℃ to obtain the epoxy asphalt concrete.
Comparative example 1
In comparison with example 3, the bio-based epoxy resin was replaced with bisphenol a epoxy resin, and the rest of the procedure was the same as in example 3.
Comparative example 2
Compared with the example 3, in the step of preparing the modified sepiolite, only the ethylenediamine tetraacetic acid solution is used for modification, and the rest is the same as the example 3.
Comparative example 3
The sepiolite was not treated in comparison with example 3, and the rest was the same as in example 3.
Test detection
The epoxy asphalt concrete prepared in the examples 1 to 3 and the comparative examples 1 to 3 is prepared into standard test blocks with the same size, a concrete stress tester is used for testing the performance of each group of concrete test blocks, and the test results are shown in the following table 1; measuring the permeability coefficient of each group of concrete by using a concrete permeability coefficient instrument, wherein the detection result is shown in table 1;
| temperature at cracking,. degree.C | Stress at cracking, kg/cm3 | Coefficient of water permeability mm/s | |
| Example 1 | -40.2～-42.5 | 39.62 | 0.80 |
| Example 2 | -40.8～-42.7 | 40.00 | 0.82 |
| Example 3 | -40.5～-42.5 | 40.07 | 0.82 |
| Comparative example 1 | -40.2～-42.3 | 37.05 | 0.80 |
| Comparative example 2 | -35.7～-37.0 | 38.15 | 0.80 |
| Comparative example 3 | -34.5～-35.1 | 34.75 | 0.67 |
TABLE 1
As can be seen from the data in Table 1, the epoxy asphalt concrete prepared in examples 1-3 has the lowest low-temperature cracking temperature of-42.5 to-42.7 ℃ and excellent low-temperature crack resistance, and compared with example 3, the epoxy asphalt concrete prepared in comparative example 1 has reduced stress during cracking because the bio-based epoxy resin contains abundant aromatic ring structures, which make the strength and stability of the bio-based epoxy resin better. Comparative examples 2 to 3 compared with example 3, although sepiolite was added, in comparative examples 2 to 3, excess ethylenediaminetetraacetic acid was not removed during the sepiolite treatment, thus resulting in no generation of cationic quaternary ammonium salt in the system, and the adhesion of epoxy asphalt to stone was relatively weakened, resulting in deterioration of low-temperature crack resistance.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a road bridge is with epoxy asphalt concrete which characterized in that: the epoxy asphalt concrete comprises the following raw materials, by weight, 35-45 parts of epoxy asphalt, 180 parts of cement, 350 parts of aggregate and 150 parts of water.
2. The epoxy asphalt concrete for roads and bridges of claim 1, wherein: the epoxy asphalt comprises the following raw materials, by weight, 25-35 parts of bio-based epoxy resin, 75-90 parts of matrix asphalt, 15-20 parts of modified sepiolite and 5-7 parts of a curing agent.
3. The epoxy asphalt concrete for roads and bridges of claim 2, wherein: the modified sepiolite is mainly prepared by reacting sepiolite fibers, ethylene diamine tetraacetic acid, dodecyl-N, N-dimethyl tertiary amine and epichlorohydrin.
4. The epoxy asphalt concrete for roads and bridges of claim 2, wherein: the bio-based epoxy resin is mainly prepared by reacting eugenol, epichlorohydrin and tetrabutylammonium bromide.
5. The epoxy asphalt concrete for roads and bridges of claim 2, wherein: the curing agent is an acid anhydride curing agent which is an amine curing agent or an acid anhydride curing agent.
6. The epoxy asphalt concrete for roads and bridges of claim 2, wherein: the epoxy asphalt also comprises a toughening agent, a compatilizer and a diluent.
7. A preparation method of epoxy asphalt concrete for roads and bridges is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring, adding an ethylene diamine tetraacetic acid solution, stirring, filtering, and drying to constant weight to obtain activated sepiolite;
dispersing the activated sepiolite into a dilute sulfuric acid solution, heating to 105-115 ℃, and adding epichlorohydrin for reaction under the protection of nitrogen to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 80-90 ℃ for reaction, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane, adding tetrabutyl ammonium bromide, uniformly stirring, carrying out nitrogen protection, heating to 115-125 ℃ for reaction, cooling, adding a sodium hydroxide solution, carrying out reaction, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 0-10 ℃, adding peroxyacetic acid for reaction, extracting, distilling under reduced pressure, and drying to obtain the bio-based epoxy resin;
s2, heating the matrix asphalt, adding a toughening agent, a compatilizer and a curing agent, and stirring to obtain a component A; heating the bio-based epoxy resin prepared in the step S1 to 75-80 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 125-135 ℃, adding the component B into the component A, and stirring to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing cement, water, aggregate and the epoxy asphalt prepared in the step (2), and heating and stirring to obtain the epoxy asphalt concrete.
8. The method for preparing the epoxy asphalt concrete for roads and bridges according to claim 7, wherein the method comprises the following steps: comprising the following steps;
(1) preparing modified sepiolite: dispersing sepiolite fibers in deionized water to form sepiolite suspension, adding an acid solution into the suspension, stirring for 30-40min, adding an ethylene diamine tetraacetic acid solution, stirring for 10-15min, filtering, and drying to constant weight to obtain activated sepiolite;
dispersing the activated sepiolite into a dilute sulfuric acid solution, heating to 105-115 ℃, adding epoxy chloropropane under the protection of nitrogen, and reacting for 8-10h to obtain a white reactant; adding dodecyl-N, N-dimethyl tertiary amine into the white reactant, keeping the temperature at 80-90 ℃, reacting for 10-12h, filtering, washing and drying to obtain modified sepiolite;
(2) preparing epoxy asphalt:
s1, mixing eugenol and epoxy chloropropane according to the mass ratio of 1:1-3, adding tetrabutyl ammonium bromide, uniformly stirring, protecting with nitrogen, heating to 115-125 ℃, reacting for 3-4h, cooling to 60-70 ℃, adding a sodium hydroxide solution, reacting for 1-2h, extracting with sodium chloride, washing with water, and drying to obtain a product A; dissolving the product A in dichloromethane, controlling the temperature to be 0-10 ℃, adding peroxyacetic acid, reacting for 40-48h, extracting by using a sodium carbonate solution, distilling under reduced pressure, and drying to obtain the bio-based epoxy resin;
s2, heating the matrix asphalt to the temperature of 125-; heating the bio-based epoxy resin prepared in the step S1 to 75-80 ℃, adding a diluent and the modified sepiolite prepared in the step (1), and uniformly stirring to obtain a component B; keeping the temperature at 125-135 ℃, adding the component B into the component A, and stirring for 45-60min to obtain epoxy asphalt;
(3) preparing epoxy asphalt concrete: and (3) mixing the cement, the water, the aggregate and the epoxy asphalt prepared in the step (2), and stirring at the temperature of 125-145 ℃ to obtain the epoxy asphalt concrete.
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| CN116376441A (en) * | 2023-03-20 | 2023-07-04 | 北京东方雨虹防水技术股份有限公司 | Flexible epoxy asphalt corrosion-resistant coating and preparation and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139511A (en) * | 1976-11-19 | 1979-02-13 | Nippon Oil Company, Ltd. | Asphalt compositions |
| CN102675886A (en) * | 2012-05-07 | 2012-09-19 | 湖北大学 | Fiber-reinforced epoxy asphalt material and preparation method thereof |
| CN105924623A (en) * | 2016-04-29 | 2016-09-07 | 河北大学 | Eugenol epoxy resin and preparing method and application thereof |
| US20160297968A1 (en) * | 2014-01-03 | 2016-10-13 | Research Institute Of Highway Ministry Of Transport | Thermoset modified additive for asphalt mixture, preparation method thereof and asphalt mixture |
| CN108178571A (en) * | 2017-12-13 | 2018-06-19 | 苍南县交通建设工程有限公司 | A kind of high intensity ground surface material and preparation method thereof |
| CN108421537A (en) * | 2016-07-15 | 2018-08-21 | 温州泓呈祥科技有限公司 | A kind of compound adsorbent and its preparation method and application |
| CN110790533A (en) * | 2019-10-17 | 2020-02-14 | 张海龙 | Epoxy asphalt concrete for roads and bridges and preparation method thereof |
-
2021
- 2021-05-21 CN CN202110557548.6A patent/CN113277783A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4139511A (en) * | 1976-11-19 | 1979-02-13 | Nippon Oil Company, Ltd. | Asphalt compositions |
| CN102675886A (en) * | 2012-05-07 | 2012-09-19 | 湖北大学 | Fiber-reinforced epoxy asphalt material and preparation method thereof |
| US20160297968A1 (en) * | 2014-01-03 | 2016-10-13 | Research Institute Of Highway Ministry Of Transport | Thermoset modified additive for asphalt mixture, preparation method thereof and asphalt mixture |
| CN105924623A (en) * | 2016-04-29 | 2016-09-07 | 河北大学 | Eugenol epoxy resin and preparing method and application thereof |
| CN108421537A (en) * | 2016-07-15 | 2018-08-21 | 温州泓呈祥科技有限公司 | A kind of compound adsorbent and its preparation method and application |
| CN108178571A (en) * | 2017-12-13 | 2018-06-19 | 苍南县交通建设工程有限公司 | A kind of high intensity ground surface material and preparation method thereof |
| CN110790533A (en) * | 2019-10-17 | 2020-02-14 | 张海龙 | Epoxy asphalt concrete for roads and bridges and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116376441A (en) * | 2023-03-20 | 2023-07-04 | 北京东方雨虹防水技术股份有限公司 | Flexible epoxy asphalt corrosion-resistant coating and preparation and application thereof |
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